Discussion question: Many people on the scene jumped on the gunman who was shooting at close range. A middle-aged woman tried to stop him from reloading his gun. How do you think you would react in a situation like this?

I heard about this story, the woman became a hero in the US. As to how I would react, I could tell you I would do the same, but it sounds unconvincing.
Generally speaking, I think people should be vigilant (hawk-eyed) sometimes and less indifferent.